Description: Invoke callback methods inside or outside of timed loops.
- callback –
- one or more methods to be called. Each given method runs in the matching loop iteration.
- All current iteration counts/events (from inner-most to outer-most loop) are passed as arguments.
- discardLast –
- whether to discard the last callback method after its usage or to call it again until the loop's end.
- Defaults to false.
Tip: If you want to have a callback method called exactly once in a loop, use .then(callback,true).